A famous scientist, a young research zoologist, an American engineer, descend to the murky depths of the ocean. There, Horror rising from a black abyss severs their lifelines. As guest-prisoners they taste the desperate, dangerous life of a strange underwater community.
This is very offhand translation of Alexandre Dumas version of Nutcracker legend. Dumas himself was very cavalier with Hoffman's original gothic horror so he should not complain that someone done the same to his own book. Result is a very good children fairytale.